Scientists X-ray Chocolate (IMAGE) Deutsches Elektronen-Synchrotron DESY Caption With DESY's bright X-ray source PETRA III the scientists could follow the migration of liquid fat (yellow) through chocolate live for the first time. The characteristic X-ray pattern (right) reveal details down to nanometre sizes. Credit Svenja Reinke/Hamburg University of Technology Usage Restrictions Free for use by the media if reporting on the related paper. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.